Jabez burns



(No Model.)Y

J. BURNS.

Coffee Roaster.

No. 241,295. Patented May1o,1s8|.

UNITED STATES PATENT EEICE..

JABEZ BURNS, OF BROOKLYN, NEW YOBK, ASSIGNOR TO W ILLIAM DURBROW, OFSAME PLACE.

COFFEE-ROASTER.

SPECIFICATION forming part of Letters Patent No. 241,295, dated May 10,1881.

Application filed October 21, 1880.

To all whom it may concern:

Be it known that I, JABEZ BURNS, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and useful Improvements in Coffee-Roasters, ot' which thefollowing is a specification.

This invention is adapted, among others, to that class of apparatus forwhich Letters Patent of the United States were granted to me October 19,1864, No. 44,704, and it consists in certain novel combinations of partshereinafter fully described, and pointed out in the claims.

This invention is illustrated in the accompanying drawings, inwhichFigure 1 represents a vertical crosssection. Fig. 2 is a longitudinalvertical section. Fig. 3 is a rear view.

Similar letters indicate corresponding parts.

The letter A designates the roasting-cylinder, which is arranged withina surrounding casing, B, which forms a heating-chamber, said cylinderbeing fixed to a shaft, C, capable of being revolved,which shaft isjournaled in the outer casing. One end of the cylinder A is open andcommunicates, through the casing B, with a hopper or passage forintroducing the material into the cylinder. Wit-hin the cylinder arearranged double spiral blades D D', extending in opposite directions,one inside the other, so that when the cylinder is put in 1notion oneset of blades propel the material to be roasted in one direction and theother set in a contrary direction. The vertical walls of the casing ateach end of the machine not only serve to support the shaft of theroasting-cylinder, but they are each formed or provided with aninwardly-projecting gas-chamber, I, connected together by the series ofpipes F, which carry the gas-burners H. The gas enters through a pipe,J, into one of the gaschambers I, and from thence it passes through thepipes F to the opposite gas-chamber, by which means the pressure of gasthroughout the pipes is equalized and the burners uniformly supplied.

The letter Gr indicates a series of air-supply pipes for connecting witha suitable reservoir containing air under pressure, and said pipesextend along parallel with the gas-pipes, and are provided with suitableburners, which are (No model.)

adjacent to the gas-burners, whereby the gas and air mix togetherdirectly at the point of combustion, thereby creating an intense heat,

which is directed onto the roasting-cylinder.

The gas-feed chambers I are preferably curved, as shown, and the gas andair pipes are arranged in a plane concentric to the axis of theroasting-cylinder.

In this example the burners H are respectivel y constructed with acentral gas-channel, 10, (see Fig. 4,) open at both ends, and with anair-jacket, 11, open at the upper end, such channel and jacketcommunicating with the appropriate pipes, but, if desired, other formsof burners may be used.

The arrangement of the burners H inthe heating-chamber has the effect ofpreventing the loss or waste of heat.

I do not broadly claim a roasting-cylinder arranged entirely within asurrounding casing and heated by means of gas-burning devices arrangedbeneath the cylinder, as such is not my invention.

What I claim as new, and desire to secure by Letters Patent, is

1. In a coffee-roastin g apparatus, the surrounding casing B, supportingthe shaft of the roastin gcylinder, and formed or provided withinwardly-projecting gas-chambers I, in combination with a pipe or pipesconnecting said gas-chambers and provided with suitable burners,substantially as described. l

2. In a machine for roastin g coffee and similar material, thecombination, with a surrounding casing, in which the roasting-cylinderis journaled, of gas-chambers formed or provided on the vertical endwalls of the casing, a pipe or pipes provided with burners andconnecting said gas-chambers together, and an airsupply pipe or pipesarranged to permit the admixture of air with the gas at the point ofcombustion, all substantially as shown and described.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

JABEZ BURNS. [1.. s] Witnesses:

W. HAUFE, E. F. KASTENHUBER.

